html,
body {
  margin: 0;
  font-family: arial, "Microsoft YaHei";
  background-color: #555;
  color: #FEFEFE;
}

#fileWrapper {
  transition: all 0.5s ease;
}

#fileWrapper:hover {
  opacity: 1!important;
}

#visualizer_wrapper {
  text-align: center;
}

#info {
  height: 100px;
  line-height: 100px;
  text-align: center;
  font-size: 26px;
}

.file {
  position: relative;
  display: inline-block;
  background: #22c3aa;
  border: 1px solid #22c3aa;
  border-radius: 4px;
  padding: 5px 14px;
  overflow: hidden;
  color: #fff;
  text-decoration: none;
  text-indent: 0;
  line-height: 20px;
  left: 50%;
  transform: translate(-50%);
  margin-top: 20px;
  transition: 0.5s;
}

.file input {
  position: absolute;
  font-size: 100px;
  right: 0;
  top: 0;
  opacity: 0;
  cursor: pointer;
}

.file:hover {
  background: #38f9d7;
  border-color: #38f9d7;
  color: #fff;
  text-decoration: none;
  cursor: pointer;
  transition: 0.5s;
}
